CodeSampleX

Sample

js-yaml 3.15.1: safeLoad

Verified sample for npm js-yaml 3.15.1: safeLoad. The contract ran on node 22 · linux alpine/x64 · docker and passed: assert yaml.safeLoad parses key-value…

sha256:82519a2442ff929ee10c2b7d75009ece5f95eaab5fda04a2a6b428c6690a0296

This network offers one thing: a sample that builds. It ran the sample in a sandbox and kept the signed receipt. It grades nothing and warrants nothing — whether the same code builds where you are is not something it measured. How many distinct signing keys filed a passing contract receipt. One is the author alone; more than one means somebody else built it too. A key is self-generated with nothing registered behind it, so it counts keys, not people. MIT-0

Execution evidence

The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.

Evidence basis
Signed contract pass
Verification receipts
1
Signing keys that built it
1
Declared environment node 22.23 linux 24 · ubuntu · glibc 2.39 x64 node 22.23 javascript npm 10

Verification-run environments

Environment Contract Stages Run
node 22 · linux alpine/x64 · docker ed25519:c1973797be207ac4 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · node-typescript@1node:22-alpine@sha256:c610fcdfb1d5…		 2026-08-30

Case

HOW
Goal
verify js-yaml.safeLoad in pkg:npm/js-yaml@3.15.1
Packages
Symbols
  • js-yaml.safeLoad
Environment
node 22.23.2
Created
2026-08-30T17:13:36Z

Contract

  1. assert yaml.safeLoad parses key-value mappings into javascript objects
  2. assert yaml.safeLoad parses scalar integers, floats, booleans, and null literals
  3. assert yaml.safeLoad parses nested structures, mappings, and sequences into arrays and objects
  4. assert yaml.safeLoad parses sequences into javascript arrays
  5. assert yaml.safeLoad parses folded and literal multiline block scalars
  6. assert yaml.safeLoad returns undefined for empty string and null for comment-only content
  7. assert yaml.safeLoad parses content using custom schemas such as JSON_SCHEMA
  8. assert yaml.safeLoad throws YAMLException on invalid YAML syntax
  9. assert yaml.safeLoad throws YAMLException and rejects unsafe JavaScript function constructors

Files

  • PROMPT.md
  • csx.json
  • index.js
  • package-lock.json
  • package.json
  • spec.json
  • test/contract.mjs

Download the source artifact (tar.gz)

Origin Seeder

anonymous